$ git clone -n https://src.fedoraproject.org/rpms/rust-grep-pcre2.git /var/lib/mock/f40-build-2072698-49334/root/chroot_tmpdir/scmroot/rust-grep-pcre2
Cloning into '/var/lib/mock/f40-build-2072698-49334/root/chroot_tmpdir/scmroot/rust-grep-pcre2'...
$ git fetch origin 027843bfcac5205edf55c94a46de21eb6c647a9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-grep-pcre2
 * [new ref]         027843bfcac5205edf55c94a46de21eb6c647a9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 027843b Update to version 0.1.7; Fixes RHBZ#2251598